JP2012033740A - Coil - Google Patents
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- JP2012033740A JP2012033740A JP2010172477A JP2010172477A JP2012033740A JP 2012033740 A JP2012033740 A JP 2012033740A JP 2010172477 A JP2010172477 A JP 2010172477A JP 2010172477 A JP2010172477 A JP 2010172477A JP 2012033740 A JP2012033740 A JP 2012033740A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2871—Pancake coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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Abstract
Description
本発明は、インダクタやトランスとして種々の電気機器に使用されるコイルに関し、特に、無接点電力伝送（非接触電力伝送）用として好適な薄型タイプのコイルに関する。 The present invention relates to a coil used in various electrical devices as an inductor and a transformer, and more particularly to a thin type coil suitable for non-contact power transmission (non-contact power transmission).
近年、送電側装置内のコイルと受電側装置内のコイルとの電磁結合によって無接点（非接触）により電力の授受を行うように構成された無接点電力伝送の技術が、携帯電話や携帯型情報端末機器、家庭用電気機器等において利用されるようになっている（下記特許文献１，２参照）。 2. Description of the Related Art In recent years, contactless power transmission technology configured to transmit and receive power in a non-contact (non-contact) manner by electromagnetic coupling between a coil in a power transmission side device and a coil in a power reception side device has become a cellular phone and a portable type. It is used in information terminal devices, household electric devices, and the like (see Patent Documents 1 and 2 below).
このような無接点電力伝送が用いられる電気機器では送電側および受電側共に装置の小型化や薄型化が強く要請されるものも多く、そのため用いられるコイルにおいてもこのような要請に対応し易い薄型タイプの空芯コイルが用いられる場合が多い。また、コイルの端部に接続される端子はコイルの外周部に配置されるのが一般的であるため、コイルの巻線の一方側および他方側は共にコイルの外周まで引き出されている必要がある。 Many electric devices using such non-contact power transmission are strongly required to reduce the size and thickness of the power transmission side and the power reception side, and the coils used for this purpose are also thin enough to meet such requirements. A type of air-core coil is often used. Also, since the terminals connected to the end of the coil are generally arranged on the outer periphery of the coil, one side and the other side of the coil winding must both be drawn to the outer periphery of the coil. is there.
コイルの巻回手法としては、コイルの巻線の一方側を内周に留めておきながら、巻線の他方側を内周から外周に向けて渦状に巻回し、巻回後に巻線の一方側を、コイル端面上を這わすように内周から外周に向けて引き出す手法（以下「通常巻き」と称する）が一般的に知られている。この通常巻きの場合は、巻線の一方側を内周からコイル端面上に引き出す際に巻線を折り曲げる必要があるため巻線（特に、線径の大きな単線の場合）に余計な力が作用し易く、また、巻線の引出しライン部分が巻線の線径分だけ厚みが大きくなってしまう（下記特許文献１の図２７，２８参照）。 As a coil winding method, one side of the coil is wound around the inner periphery while the other side of the coil is wound in a spiral shape from the inner periphery to the outer periphery. In general, a method of pulling out the wire from the inner periphery toward the outer periphery so as to roll on the end face of the coil (hereinafter referred to as “normal winding”) is known. In the case of this normal winding, it is necessary to bend the winding when pulling out one side of the winding from the inner circumference onto the coil end face, so extra force acts on the winding (especially in the case of a single wire with a large wire diameter). In addition, the lead-out line portion of the winding becomes thicker by the wire diameter of the winding (see FIGS. 27 and 28 of Patent Document 1 below).
一方、下記特許文献３に記載されているように、巻線両端の中央付近に巻軸を当て、コイルの巻線の一方側および他方側をそれぞれ互いに逆方向に渦状に巻回する巻回手法（以下「α巻き」と称する）も知られている。このα巻きによれば、巻線に無理な力が作用することなく巻線の一方側および他方側を共に外周まで引き出すことが可能となる。 On the other hand, as described in Patent Document 3 below, a winding method in which a winding shaft is applied in the vicinity of the center of both ends of the winding, and one side and the other side of the coil winding are spirally wound in opposite directions. (Hereinafter referred to as “α winding”) is also known. According to the α winding, it is possible to draw both the one side and the other side of the winding to the outer circumference without applying an excessive force to the winding.
無接点電力伝送システムでは、送電側装置のコイル径と受電側装置のコイル径とが互いに同等である場合にコイル間の電磁結合性が良くなり、これにより効率良く電力を伝送することが可能となる。従来一般的な無接点電力伝送システムでは、受電側装置のコイル径と同等の径を有するコイルが送電側装置に１つのみ設けられているため、これとは大きさが異なる径のコイルを有する受電側装置に対しては効率の良い電力伝送を行うことが困難となる。 In the non-contact power transmission system, when the coil diameter of the power transmission side device and the coil diameter of the power reception side device are equal to each other, the electromagnetic coupling between the coils is improved, and thus it is possible to transmit power efficiently. Become. In a conventional non-contact power transmission system, since only one coil having a diameter equivalent to the coil diameter of the power receiving side device is provided in the power transmission side device, the coil has a different diameter. It becomes difficult to perform efficient power transmission to the power receiving device.
これに対し、上記特許文献２の無接点電力伝送システムでは、仕様が異なる複数種類の受電側装置（携帯電話）に対応するために、送電側装置（充電器）内に複数のコイルを並設することが提案されている。送電側装置の複数のコイルの径を互いに異なるようにすれば、コイル径が互いに異なるような複数種類の受電側装置に対しても効率良く電力を伝送することが容易となるが、複数のコイルを並設するためのスペースを確保しなければならないので送電側装置が大型化するという問題がある。 On the other hand, in the non-contact power transmission system of Patent Document 2, a plurality of coils are arranged in parallel in the power transmission side device (charger) in order to support a plurality of types of power reception side devices (mobile phones) having different specifications. It has been proposed to do. If the diameters of the plurality of coils of the power transmission side device are different from each other, it becomes easy to efficiently transmit power to a plurality of types of power reception side devices having different coil diameters. Therefore, there is a problem that the power transmission side device is increased in size because it is necessary to secure a space for arranging the devices.
このような複数のコイルの並設スペースを省くために、大径のコイルと小径のコイルを同軸上に互いに重ねるように配置し、相手側のコイルの径の大きさに応じて、大径のコイルを用いる場合と小径のコイルを用いる場合とを切り替えるように構成することも考えられる。このような態様によれば、大径のコイルと小径のコイルを一平面上に並設した場合に比べて、コイルの径方向の省スペース化が可能となる。しかし、コイルを同軸上に重ねる必要があるために巻回軸線方向（高さ方向）については、より大きなスペースが必要となるという問題がある。 In order to save such a parallel arrangement space of a plurality of coils, a large-diameter coil and a small-diameter coil are arranged so as to overlap each other on the same axis, and the large-diameter coil is It is also conceivable to configure to switch between using a coil and using a small-diameter coil. According to such an aspect, it is possible to save space in the radial direction of the coil as compared with a case where a large-diameter coil and a small-diameter coil are arranged side by side on one plane. However, since it is necessary to overlap the coils on the same axis, there is a problem that a larger space is required in the winding axis direction (height direction).
そこで、相手側のコイルの大きさに応じてコイルとして利用される領域の径の大きさを変更し得るようなコイルがあれば便利である。例えば、小径に巻回された巻線を環状に巻回された巻線の内側（内径部）に配置し、相手側のコイル径の大きさに応じて、小径の巻線のみをコイルとして用いる場合と、小径の巻線と環状の巻線とを併せて１つの大径のコイルとして用いる場合とを切り替えるように構成することが考えられる。このような態様によれば、相手側のコイルの大きさの違いに対応しつつ、１つのコイルとしての巻回軸線方向の薄型化が可能となる。しかし、環状の巻線と小径の巻線との間に、これらを組み合わせるためのスペースを設けておく必要があるので、１つのコイルとしての径方向の大きさが必要以上に増大するという問題がある。 Therefore, it is convenient if there is a coil that can change the size of the diameter of the region used as the coil according to the size of the coil on the other side. For example, a winding wound around a small diameter is disposed inside (inner diameter part) of the winding wound annularly, and only the winding with a small diameter is used as a coil according to the size of the coil diameter on the other side. It may be configured to switch between the case of using a small-diameter winding and an annular winding as a single large-diameter coil. According to such an aspect, it is possible to reduce the thickness in the winding axis direction as one coil while accommodating the difference in size of the counterpart coil. However, since it is necessary to provide a space for combining these windings between the annular winding and the small-diameter winding, there is a problem that the radial size of one coil increases more than necessary. is there.
本発明は、このような事情に鑑みなされたもので、コイルとして利用される領域の径の大きさを変更することができ、かつ巻回軸線方向の薄型化および径方向の小型化が可能なコイルを提供することを目的とする。 The present invention has been made in view of such circumstances, and can change the size of the diameter of a region used as a coil, and can be thinned in the winding axis direction and downsized in the radial direction. An object is to provide a coil.
本発明のコイルは、上記目的を達成するために以下の特徴を備えてなる。 In order to achieve the above object, the coil of the present invention has the following features.
すなわち、本発明に係るコイルは、巻回軸線の回りに巻回された、単線または複線からなる第１巻線と、該第１巻線の外周部に密着するように該第１巻線と同軸に巻回された、単線または複線からなる第２巻線と、を備えたコイルであって、
前記第１巻線および前記第２巻線のうち少なくとも該第１巻線は、巻線の一方側が内周から外周まで巻回されるとともに、巻線の他方側が内周から該巻線の一方側と交差しながら外周まで引き出されており、かつ該巻線の一方側と該巻線の他方側との交差部分における前記巻回軸線方向の厚みが他の部分の厚みと同等に構成されていることを特徴とする。
That is, the coil according to the present invention includes a first winding made of a single wire or a double wire wound around a winding axis, and the first winding so as to be in close contact with the outer periphery of the first winding. A coil comprising a second winding consisting of a single wire or a double wire, wound coaxially,
At least the first winding of the first winding and the second winding is wound on one side of the winding from the inner periphery to the outer periphery, and on the other side of the winding from the inner periphery to one of the windings. The winding is pulled out to the outer periphery while intersecting the side, and the thickness in the winding axis direction at the intersection of one side of the winding and the other side of the winding is configured to be equal to the thickness of the other part. It is characterized by being.
本発明に係るコイルにおいて、前記巻線の他方側は、前記巻線の一方側との前記交差部分が外周に向かうにしたがって周方向にずれていくように渦状の曲線を描くようにして外周に引き出されているとすることが好ましい。 In the coil according to the present invention, the other side of the winding is on the outer periphery so as to draw a spiral curve so that the intersection with the one side of the winding moves toward the outer periphery. It is preferable that it is pulled out.
また、前記第１巻線における前記巻線の一方側および前記巻線の他方側は、それぞれ渦状の曲線を描くようにして前記第２巻線と交差しながら該第２巻線の外周まで引き出されており、かつ該第２巻線は、該第１巻線における該巻線の一方側、該巻線の他方側および該第２巻線の各々の交差部分における前記巻回軸線方向の厚みが他の部分の厚みと同等に構成されているとすることが好ましい。 Further, one side of the winding and the other side of the winding in the first winding are drawn to the outer periphery of the second winding while intersecting the second winding so as to draw a spiral curve. And the second winding has a thickness in the winding axis direction at one side of the winding in the first winding, the other side of the winding, and the intersection of each of the second windings. Is preferably configured to be equivalent to the thickness of other portions.
なお、本発明において、巻線の他方側を内周から巻線の一方側と交差させながら外周まで引き出す際には、内周から外周に向けて巻線の他方側を巻線の一方側とは逆向きに巻回しながら引き出すことが好ましい。 In the present invention, when pulling out the other side of the winding from the inner periphery to the outer periphery while intersecting with one side of the winding, the other side of the winding is set as one side of the winding from the inner periphery to the outer periphery. Is preferably pulled out while being wound in the opposite direction.
本発明のコイルによれば、巻回軸線の回りに巻回された第１巻線と該第１巻線の外周部に同軸に巻回された第２巻線とを備えているので、第１巻線のみを小径のコイルとして利用する場合と、第１巻線と第２巻線とを併せて１つの大径のコイルとして利用する場合とを切り替えること、すなわち、コイルとして利用される領域の径の大きさを変更することが可能である。しかも、第２巻線が第１巻線の外周部に密着するように巻回されていることにより、第１巻線と第２巻線との間に無駄なスペースが生じることが無いので、１つのコイルとしての径方向の小型化が可能となる。 According to the coil of the present invention, the first winding wound around the winding axis and the second winding wound coaxially around the outer periphery of the first winding are provided. Switching between a case where only one winding is used as a small-diameter coil and a case where the first winding and the second winding are used together as one large-diameter coil, that is, a region used as a coil It is possible to change the size of the diameter. In addition, since the second winding is wound so as to be in close contact with the outer periphery of the first winding, there is no useless space between the first winding and the second winding. The size in the radial direction as one coil can be reduced.
さらに、２つの巻線のうち少なくとも第１巻線は、巻線の一方側が内周から外周まで巻回されるとともに、巻線の他方側が内周から巻線の一方側と交差しながら外周まで引き出されており、かつ巻線の一方側と巻線の他方側との交差部分における巻回軸線方向の厚みが他の部分の厚みと同等に構成されていることにより、少なくとも第１巻線の巻回領域については、巻線の他方側の引き出しライン部分の厚みが他の部分より厚くなることが無いので、巻回軸線方向の厚みを均一化することができるとともに薄型化が可能となる。 Further, at least the first winding of the two windings is wound from one side of the winding from the inner periphery to the outer periphery, and the other side of the winding crosses the one side of the winding from the inner periphery to the outer periphery. And the thickness in the winding axis direction at the intersection of one side of the winding and the other side of the winding is configured to be equal to the thickness of the other portion, so that at least the first winding In the winding region, the thickness of the lead-out line portion on the other side of the winding does not become thicker than the other portions, so that the thickness in the winding axis direction can be made uniform and the thickness can be reduced.
また、第１巻線および第２巻線の双方において、巻線の一方側が内周から外周まで巻回されるとともに、巻線の他方側が内周から巻線の一方側と交差しながら外周まで引き出されており、かつ巻線の一方側と巻線の他方側との交差部分における巻回軸線方向の厚みが他の部分の厚みと同等に構成され、さらに第１巻線における巻線の一方側および巻線の他方側は、それぞれ渦状の曲線を描くようにして第２巻線と交差しながら該第２巻線の外周まで引き出されており、かつ第２巻線は、第１巻線における巻線の一方側、巻線の他方側および該第２巻線の各々の交差部分における巻回軸線方向の厚みが他の部分の厚みと同等に構成されている態様のものによれば、第１巻線における巻線の一方側および巻線の他方側を第２巻線の外周まで引き出す際の引き出しライン部分の厚み、および第２巻線における巻線の一方側および巻線の他方側を第２巻線の外周まで引き出す際の引き出しライン部分の厚みが他の部分より厚くなることが無いので、第１巻線の巻回領域のみならず第２巻線の巻回領域においても、巻回軸線方向の厚みを均一化することができるとともに薄型化が可能となる。 Further, in both the first winding and the second winding, one side of the winding is wound from the inner periphery to the outer periphery, and the other side of the winding crosses the one side of the winding from the inner periphery to the outer periphery. And the thickness in the winding axis direction at the intersection between one side of the winding and the other side of the winding is configured to be equal to the thickness of the other portion, and one of the windings in the first winding The other side of the winding and the other side of the winding are drawn to the outer periphery of the second winding while crossing the second winding so as to draw a spiral curve, and the second winding is the first winding. According to the aspect in which the thickness in the winding axis direction at one side of the winding, the other side of the winding, and the intersecting portion of each of the second windings is configured to be equal to the thickness of the other portion. Pull out one side of the first winding and the other side of the winding to the outer circumference of the second winding The thickness of the lead-out line portion and the thickness of the lead-out line portion when pulling out one side of the winding and the other side of the winding to the outer periphery of the second winding may be thicker than the other portions. Therefore, not only in the winding region of the first winding but also in the winding region of the second winding, the thickness in the winding axis direction can be made uniform and the thickness can be reduced.
以下、上記図面に基づいて、本発明に係るコイルの実施形態について詳細に説明する。 Hereinafter, based on the said drawing, embodiment of the coil which concerns on this invention is described in detail.
〈第１実施形態〉
図１に示す第１実施形態に係るコイル１Ａは、無接点電力伝送用として好適な薄型タイプの空芯コイル（空芯部は円形）であり、巻回軸線Ｃ１Ａ（紙面に対し垂直な仮想線）の回りに巻回された第１巻線１０Ａ（本実施形態では複線で構成される）と、該第１巻線１０Ａの外周部に密着するように該第１巻線１０Ａと同軸に巻回された第２巻線２０Ａ（本実施形態では複線で構成される）とからなる。
<First Embodiment>
A coil 1A according to the first embodiment shown in FIG. 1 is a thin type air core coil (air core portion is circular) suitable for contactless power transmission, and has a winding axis C 1A (virtual axis perpendicular to the paper surface). A first winding 10A wound around the wire) (consisting of a double wire in the present embodiment), and coaxially with the first winding 10A so as to be in close contact with the outer periphery of the first winding 10A. It is composed of a wound second winding 20A (in the present embodiment, composed of double wires).
なお、第１巻線１０Ａおよび第２巻線２０Ａは、これらを構成する複線の各素線がいわゆる自己融着線（例えば、ポリウレタンで被覆した銅線の外側に熱可塑性の融着性ワニス等を被せたもの）とされたものであり、図示せぬ巻線機により巻回される段階では各素線が互いに分離可能な状態に保持され、巻回後に熱を加えることにより各素線が一体的に融着固定されている（以下の第２および第３実施形態において同じ）。 The first winding 10A and the second winding 20A are composed of so-called self-bonding wires (for example, a thermoplastic fusing varnish or the like outside a copper wire coated with polyurethane). In the stage of winding by a winding machine (not shown), the strands are held in a state where they can be separated from each other. They are integrally fused and fixed (the same applies to the following second and third embodiments).
上記第１巻線１０Ａは、その巻線の一方側１１Ａが第１巻線１０Ａの内周から外周まで図中時計回りに密に巻回されるとともに、その巻線の他方側１２Ａが内周から巻線の一方側１１Ａと交差しながら図中反時計回りに緩やかな渦状の曲線を描くように巻回（略１周回）されながら第１巻線１０Ａの外周まで引き出されている。そして、巻線の一方側１１Ａの端部１１Ａａおよび巻線の他方側１２Ａの端部１２Ａａは、それぞれ第１巻線１０Ａの外周から第２巻線２０Ａの端面上を径方向に這うようにして第２巻線２０Ａの外周まで（端部１１Ａａは図中上方へ、端部１２Ａａは図中下方へと）引き出されている。また、上記第１巻線１０Ａは、その巻線の一方側１１Ａと巻線の他方側１２Ａとの交差部分における巻回軸線Ｃ１Ａ方向の厚みが他の部分の厚みと同等に構成されている（以下、このような巻回状態を「ナルト巻き」と称する。ナルト巻きの詳細については後述する）。 In the first winding 10A, one side 11A of the winding is densely wound clockwise in the drawing from the inner circumference to the outer circumference of the first winding 10A, and the other side 12A of the winding is arranged on the inner circumference. The winding is drawn out to the outer periphery of the first winding 10A while being wound (substantially one turn) in a counterclockwise direction in the drawing while intersecting with one side 11A of the winding. Then, the end portion 11Aa on one side 11A of the winding and the end portion 12Aa on the other side 12A of the winding so as to run from the outer periphery of the first winding 10A in the radial direction on the end surface of the second winding 20A. The second winding 20A is drawn to the outer periphery (the end 11Aa is drawn upward in the figure and the end 12Aa is drawn downward in the figure). Further, in the first winding 10A, the thickness in the winding axis C1A direction at the intersection of one side 11A of the winding and the other side 12A of the winding is configured to be equal to the thickness of the other part. (Hereinafter, such a winding state is referred to as “Naruto winding”. Details of Naruto winding will be described later).
一方、上記第２巻線２０Ａは通常巻きにより巻回されている。すなわち、その巻線の一方側２１Ａが第２巻線２０Ａの内周から外周まで（第１巻線１０Ａの外周から第２巻線２０Ａの外周まで）図中時計回りに密に巻回された後、該巻線の一方側２１Ａの端部２１Ａａが第２巻線２０Ａの外周から図中下方に延出されている。また、その巻線の他方側２２Ａは、第２巻線２０Ａの内周において図中反時計回りに１/４回転ほど巻回された後、第２巻線２０Ａの内周から該第２巻線２０Ａの端面上を径方向に這うようにして第２巻線２０Ａの外周まで引き出された後、その端部２２Ａａが図中上方へと延出されている。 On the other hand, the second winding 20A is wound by normal winding. That is, one side 21A of the winding is densely wound clockwise from the inner circumference to the outer circumference of the second winding 20A (from the outer circumference of the first winding 10A to the outer circumference of the second winding 20A). Thereafter, an end 21Aa on one side 21A of the winding extends from the outer periphery of the second winding 20A downward in the drawing. Further, the other side 22A of the winding is wound about 1/4 turn counterclockwise in the figure on the inner circumference of the second winding 20A, and then the second winding is turned from the inner circumference of the second winding 20A. After being drawn to the outer periphery of the second winding 20A so as to crawl on the end face of the wire 20A in the radial direction, the end 22Aa is extended upward in the drawing.
ここで、上記第１巻線１０Ａの巻回状態（ナルト巻き）について、図４〜１１を用いて詳細に説明する。図４は第１巻線１０Ａと同様に巻回された巻線３０を概略的に図示したものであり、図５は巻線３０の巻回状態をより詳細に説明するために、巻線３０の巻回数を半減させた状態で模式的に示したものである。なお、図４（ｂ）、図５（ｂ），（ｃ）において、断面中に入れ込んだ数値は巻線の周回数を示している（以下の図６〜８において同じ）。 Here, the winding state (Naruto winding) of the first winding 10A will be described in detail with reference to FIGS. FIG. 4 schematically shows the winding 30 wound in the same manner as the first winding 10A. FIG. 5 shows the winding 30 in order to explain the winding state of the winding 30 in more detail. This is schematically shown in a state where the number of windings is halved. In FIGS. 4B, 5B, and 5C, the numerical values inserted in the cross section indicate the number of winding turns (the same applies to FIGS. 6 to 8 below).
図４，５に示す巻線３０は、２本の素線（断面円形）からなる複線で構成されており、その巻線の一方側３１（最内周部および最外周部のみ図示）が内周から外周まで図中反時計回りに密に巻回（略７周回）されるとともに、その巻線の他方側３２（ハッチングを入れた巻線）が内周から巻線の一方側３１と交差しながら図中時計回りに緩やかな渦状の曲線を描くように巻回（略１周回）されながら外周まで引き出されている。そして、巻線の一方側３１と巻線の他方側３２との交差部分における巻回軸線Ｃ３０方向の厚みが他の部分の厚みと同等に構成されている。 The winding 30 shown in FIGS. 4 and 5 is composed of a double wire composed of two strands (circular cross section), and one side 31 of the winding (only the innermost and outermost peripheral parts are shown) The winding is densely wound counterclockwise in the drawing from the circumference to the outer circumference (approximately 7 turns), and the other side 32 of the winding (the winding with hatching) intersects the one side 31 of the winding from the inner circumference. However, it is drawn out to the outer periphery while being wound (substantially one turn) so as to draw a gentle spiral curve clockwise in the figure. The thickness in the direction of the winding axis C30 at the intersection of one side 31 of the winding and the other side 32 of the winding is configured to be equal to the thickness of the other part.
すなわち、図４（ｂ）および図５（ａ），（ｂ）に示すように、巻線の他方側３２は、２本の素線が径方向に並んだ状態で巻回されているのに対し、巻線の一方側３１は、巻線の他方側３２と交差しない部分では２本の素線が巻回軸線Ｃ３０方向に積み重なった状態で巻回され、巻線の他方側３２と交差する部分（図５（ａ）において○内に数字１〜４を入れ込んで示す位置）では２本の素線が径方向に並んだ状態で巻回されている。これにより、巻線の一方側３１と巻線の他方側３２との交差部分における巻回軸線Ｃ３０方向の厚みが他の部分の厚みと同等に構成されることになる。上述の第１巻線１０Ａの巻回状態は、ここで説明した巻線３０の巻回状態と同様のものである。 That is, as shown in FIG. 4 (b) and FIGS. 5 (a) and 5 (b), the other side 32 of the winding is wound with two strands aligned in the radial direction. On the other hand, one side 31 of the winding is wound in a state where two strands are stacked in the direction of the winding axis C30 at a portion not intersecting with the other side 32 of the winding, and intersects with the other side 32 of the winding. Two strands are wound in a state where the two wires are aligned in the radial direction (the position indicated by inserting numerals 1 to 4 in ○ in FIG. 5A). As a result, the thickness in the direction of the winding axis C30 at the intersection of one side 31 of the winding and the other side 32 of the winding is configured to be equal to the thickness of the other part. The winding state of the first winding 10A is the same as the winding state of the winding 30 described here.
なお、図５（ａ）において、○内に１の位置は、巻線の一方側３１の１周回目と巻線の他方側３２とが交差する位置であり、○内に２の位置は、巻線の一方側３１の２周回目と巻線の他方側３２とが交差する位置であり、○内に３の位置は、巻線の一方側３１の３周回目と巻線の他方側３２とが交差する位置であり、○内に４の位置は、巻線の一方側３１の４周回目と巻線の他方側３２とが交差する位置である。 In FIG. 5 (a), the position 1 in ○ is the position where the first turn 31 on one side 31 of the winding intersects the other side 32 of the winding, and the position 2 in ○ is The second turn of one side 31 of the winding and the other side 32 of the winding intersect each other, and the position 3 in ○ is the third turn of one side 31 of the winding and the other side 32 of the winding. And the position 4 in ○ is the position where the fourth turn on one side 31 of the winding and the other side 32 of the winding intersect.
上述したような巻線３０の巻回状態は、図９に示すような巻回方法により形成される。すなわち、図９に示すように、巻線機の巻軸４０の周りに、巻線の一方側３１と巻線の他方側３２とを互いに逆向きに巻回していく。このとき、巻線機の巻枠（図示略）により巻軸４０方向（紙面に垂直な方向）の厚みを素線２本分の厚みとなるように規制しつつ、また巻線の一方側３１の巻回角速度Ａと巻線の他方側３２の巻回角速度Ｂとを互いに異なるように設定して巻回を行う。これにより、巻線の一方側３１と巻線の他方側３２との交差部分においては、図示せぬ巻枠により厚みが規制されることにより、巻線の一方側３１の２本の素線および巻線の他方側３２の２本の素線が共に径方向に並んだ状態に配置されることとなる。すなわち、巻線の一方側３１については、巻線の他方側３２との交差部分と非交差部分とで、巻線断面の縦横比（径方向の幅と巻回軸線方向の幅との比）が変化することになる。そして、巻回後に融着処理を行って巻軸４０から取り外すことにより、上述したような空芯タイプの巻線３０が形成される。 The winding state of the winding 30 as described above is formed by a winding method as shown in FIG. That is, as shown in FIG. 9, one side 31 of the winding and the other side 32 of the winding are wound in opposite directions around the winding axis 40 of the winding machine. At this time, the winding frame (not shown) of the winding machine regulates the thickness in the direction of the winding axis 40 (the direction perpendicular to the paper surface) to be the thickness of two strands, and also on one side 31 of the winding. The winding angular velocity A and the winding angular velocity B on the other side 32 of the winding are set to be different from each other. Thereby, at the intersection of one side 31 of the winding and the other side 32 of the winding, the two strands of one side 31 of the winding and The two strands on the other side 32 of the winding are both arranged in the radial direction. That is, for one side 31 of the winding, the aspect ratio of the winding cross section (ratio between the width in the radial direction and the width in the winding axis direction) at the intersection and non-intersection with the other side 32 of the winding. Will change. Then, the air core type winding 30 as described above is formed by performing a fusing process after winding and removing it from the winding shaft 40.
なお、このような巻回方法において、上述の２つの巻回角速度を互いに同じに設定した場合には、図１０に示すような楕円形状の巻線３０Ｄが形成される。すなわち、２つの巻回角速度を同じとすると、巻線の一方側と巻線の他方側との交差部分５０Ｄ（図中×印で示す）が径方向に直線的に並ぶことになる。各々の交差部分５０Ｄにおいては、２本の素線が径方向に並んだ状態となるので、この部分において素線１本分だけ外周側に突出することになり、その突出量が径方向に重畳される結果、コイル１０Ａの端面３３Ｄが楕円形状となる。このような巻回状態は、上述のナルト巻きとは異なるものであり、むしろ従来のα巻きに近いものであるため、本明細書ではα巻きの一種として扱う。しかし、このような巻回状態のものでも、巻線の一方側と巻線の他方側との交差部分における巻線断面の縦横比が、交差しない部分における巻線断面の縦横比と異なるように巻回され、これにより交差部分の厚みが他の部分の厚みと同等に構成される点はナルト巻きと同じであり、ナルト巻きの代替態様として用いることが可能である。 In such a winding method, when the above-described two winding angular velocities are set to be the same, an elliptical winding 30D as shown in FIG. 10 is formed. That is, assuming that the two winding angular velocities are the same, intersecting portions 50D (indicated by x in the figure) between one side of the winding and the other side of the winding are linearly arranged in the radial direction. At each crossing portion 50D, two strands are arranged in the radial direction, and therefore, at this portion, one strand is projected to the outer peripheral side, and the projection amount is superimposed in the radial direction. As a result, the end face 33D of the coil 10A has an elliptical shape. Such a winding state is different from the above-described Naruto winding, and is rather close to the conventional α winding, and is treated as a kind of α winding in this specification. However, even in such a winding state, the aspect ratio of the winding cross section at the intersection of one side of the winding and the other side of the winding is different from the aspect ratio of the winding cross section at the non-intersection. It is the same as Naruto winding in that it is wound so that the thickness of the intersecting portion is equal to the thickness of the other portion, and can be used as an alternative mode of Naruto winding.
一方、上述の２つの巻回角速度を互いに異なるように設定した場合には、図１１に示すように、巻線の一方側と巻線の他方側との交差部分５０Ｅが外周に向かうにしたがって周方向にずれていくナルト巻きの状態となり、端面３３Ｅが真円に近い形状となる巻線３０Ｅが形成される。上述の巻線３０および第１巻線１０Ａは、このナルト巻きタイプの巻線である。 On the other hand, when the two winding angular velocities described above are set to be different from each other, as shown in FIG. 11, the intersection 50E between the one side of the winding and the other side of the winding moves toward the outer periphery. Thus, the winding 30E is formed in which the end face 33E has a shape close to a perfect circle. The winding 30 and the first winding 10A described above are this Naruto winding type winding.
なお、図４，５では、巻線３０が２本の素線からなる複線で構成される場合を示しているが、巻線３０が３本以上の素線からなる複線で構成される場合や、巻線３０が単線で構成される場合であっても同様の巻回状態を形成することが可能であり、以下に示す各態様を上述の第１巻線１０Ａに適用することができる。 4 and 5 show the case where the winding 30 is composed of double wires composed of two strands, the case where the winding 30 is composed of multiple wires composed of three or more strands, Even if the winding 30 is constituted by a single wire, it is possible to form a similar winding state, and the following modes can be applied to the first winding 10A described above.
図５（ｃ）は、断面が２：１の矩形状となる平角線により構成された巻線３０´を示している。この巻線３０´では、巻線の他方側３２´が常に横に寝かせた状態（幅の長い方を径方向に配置した状態）で巻回されているのに対し、巻線の一方側３１´は、巻線の他方側３２´と交差しない部分では縦に起こした状態（幅の長い方を巻回軸線Ｃ３０´方向に配置した状態）で巻回され、巻線の他方側３２´と交差する部分では横に寝かせた状態で巻回されている。この場合でも、巻線の一方側３１´と巻線の他方側３２´との交差部分における巻回軸線Ｃ３０´方向の厚みが他の部分の厚みと同等に構成されることになる。 FIG. 5C shows a winding 30 ′ formed by a rectangular wire having a rectangular shape with a 2: 1 cross section. In this winding 30 ', the other side 32' of the winding is wound in a state where it is always laid down sideways (the longer side is arranged in the radial direction), whereas one side 31 of the winding is wound. ′ Is wound in a vertically raised state (a state in which the longer width is arranged in the direction of the winding axis C 30 ′ ) in a portion that does not intersect with the other side 32 ′ of the winding, and the other side 32 ′ of the winding It is wound in a state where it is laid sideways at the intersection. In this case, the one side 31 'and the other side winding axis C 30' direction of thickness at the intersection with 32' of the windings of the windings are configured equal to that in other portions.
図６は、８本の素線からなる複線により構成された巻線３０Ａを示している。この巻線３０Ａでは、巻線の他方側３２Ａの８本の素線が径方向に４列、巻回軸線Ｃ３０Ａ方向に２列の状態で巻回されているのに対し、巻線の一方側３１Ａは、巻線の他方側３２Ａと交差しない部分では８本の素線が径方向に２列、巻回軸線Ｃ３０Ａ方向に４列の状態で巻回され、巻線の他方側３２Ａと交差する部分では８本の素線が径方向に４列、巻回軸線Ｃ３０Ａ方向に２列の状態で巻回されている。この場合でも、巻線の一方側３１Ａと巻線の他方側３２Ａとの交差部分における巻回軸線Ｃ３０Ａ方向の厚みが他の部分の厚みと同等に構成されることになる。 FIG. 6 shows a winding 30 </ b> A configured by a double wire composed of eight strands. In this winding 30A, the eight strands on the other side 32A of the winding are wound in a state of four rows in the radial direction and two rows in the direction of the winding axis C 30A. The side 31A has eight strands wound in two rows in the radial direction and four rows in the direction of the winding axis C 30A at a portion that does not intersect with the other side 32A of the winding. In the intersecting portion, eight strands are wound in a state of 4 rows in the radial direction and 2 rows in the direction of the winding axis C30A . Even in this case, the thickness in the winding axis C30A direction at the intersection of one side 31A of the winding and the other side 32A of the winding is configured to be equal to the thickness of the other part.
図７は、６本の素線からなる複線により構成された巻線３０Ｂを示している。この巻線３０Ｂでは、巻線の他方側３２Ｂの６本の素線が径方向に６列、巻回軸線Ｃ３０Ｂ方向に１列の状態で巻回されているのに対し、巻線の一方側３１Ｂは、巻線の他方側３２Ｂと交差しない部分では６本の素線が径方向に２列、巻回軸線Ｃ３０Ｂ方向に３列の状態で巻回され、巻線の他方側３２Ｂと交差する部分では６本の素線が径方向に３列、巻回軸線Ｃ３０Ｂ方向に２列の状態で巻回されている。この場合でも、巻線の一方側３１Ｂと巻線の他方側３２Ｂとの交差部分における巻回軸線Ｃ３０Ｂ方向の厚みが他の部分の厚みと同等に構成されることになる。 FIG. 7 shows a winding 30 </ b> B configured by a double line composed of six strands. In this winding 30B, the six strands on the other side 32B of the winding are wound in six rows in the radial direction and in one row in the direction of the winding axis C 30B , whereas one of the windings On the side 31B, six strands are wound in a state of two rows in the radial direction and three rows in the direction of the winding axis C 30B at a portion not intersecting with the other side 32B of the winding. In the intersecting portion, six strands are wound in a state of three rows in the radial direction and two rows in the direction of the winding axis C30B . Even in this case, the thickness in the winding axis C30B direction at the intersection of one side 31B of the winding and the other side 32B of the winding is configured to be equal to the thickness of the other part.
図８は、８本の素線からなる複線により構成された巻線３０Ｃを示している。この巻線３０Ｃでは、巻線の他方側３２Ｃの８本の素線が径方向に８列、巻回軸線Ｃ３０Ｃ方向に１列の状態で巻回されているのに対し、巻線の一方側３１Ｃは、巻線の他方側３２Ｃと交差しない部分では８本の素線が径方向に２列、巻回軸線Ｃ３０Ｃ方向に４列の状態で巻回され、巻線の他方側３２Ｃと交差する部分では８本の素線が、巻線の一方側３１Ｃの８本の素線の図中下側に形成されるスペースを内周側から順に埋めるような状態で巻回されている。この場合でも、巻線の一方側３１Ｃと巻線の他方側３２Ｃとの交差部分における巻回軸線Ｃ３０Ｃ方向の厚みが他の部分の厚みと同等に構成されることになる。 FIG. 8 shows a winding 30 </ b> C composed of a double wire composed of eight strands. In this winding 30C, the eight strands on the other side 32C of the winding are wound in eight rows in the radial direction and in one row in the winding axis C 30C , whereas one of the windings The side 31C has eight strands wound in two rows in the radial direction and four rows in the direction of the winding axis C 30C at a portion that does not intersect with the other side 32C of the winding. In the intersecting portion, eight strands are wound in such a manner that the space formed on the lower side in the drawing of the eight strands on one side 31C of the winding is sequentially filled from the inner peripheral side. Even in this case, the thickness in the winding axis C30C direction at the intersection of one side 31C of the winding and the other side 32C of the winding is configured to be equal to the thickness of the other part.
上述のように構成された第１実施形態に係るコイル１Ａによれば、巻回軸線Ｃ１Ａの回りに巻回された第１巻線１０Ａと、その外周部に同軸に巻回された第２巻線２０Ａとを備えているので、第１巻線１０Ａのみを小径のコイルとして利用する場合と、第１巻線１０Ａと第２巻線２０Ａとを併せて１つの大径のコイルとして利用する（第１巻線１０Ａにおける巻線の一方側１１Ａの端部１１Ａａと第２巻線２０Ａにおける巻線の他方側２２Ａの端部２２Ａａとを電気的に接続して用いる）場合とを切り替えること、すなわち、コイル１Ａとして利用される領域の径の大きさを変更することが可能である。しかも、第２巻線２０Ａが第１巻線１０Ａの外周部に密着するように巻回されていることにより、第１巻線１０Ａと第２巻線２０Ａとの間に無駄なスペースが生じることが無いので、１つのコイル１Ａとしての径方向の小型化が可能となる。なお、第１巻線１０Ａのみをコイル１Ａとして利用する場合と、第２巻線２０Ａのみをコイル１Ａとして利用する場合とを切り替えるなど、他の態様を採用することも可能である。 According to the coil 1A according to the first embodiment configured as described above, the first winding 10A wound around the winding axis C 1A, the wound coaxially on its outer periphery 2 Since the winding 20A is provided, when only the first winding 10A is used as a small-diameter coil, the first winding 10A and the second winding 20A are used together as one large-diameter coil. (Used by electrically connecting the end portion 11Aa on one side 11A of the winding in the first winding 10A and the end portion 22Aa on the other side 22A of the winding in the second winding 20A), That is, it is possible to change the size of the diameter of the region used as the coil 1A. Moreover, since the second winding 20A is wound so as to be in close contact with the outer periphery of the first winding 10A, a useless space is generated between the first winding 10A and the second winding 20A. Therefore, it is possible to reduce the size in the radial direction as one coil 1A. It is also possible to adopt other modes such as switching between the case where only the first winding 10A is used as the coil 1A and the case where only the second winding 20A is used as the coil 1A.
さらに、第１巻線１０Ａは、巻線の一方側１１Ａが内周から外周まで巻回されるとともに、巻線の他方側１２Ａが内周から巻線の一方側１１Ａと交差しながら外周まで引き出されており、かつ巻線の一方側１１Ａと巻線の他方側１２Ａとの交差部分における巻回軸線Ｃ１Ａ方向の厚みが他の部分の厚みと同等に構成されていることにより、第１巻線１１Ａの巻回領域については、巻回軸線Ｃ１Ａ方向の厚みを均一化することができるとともに薄型化が可能となる。 Further, the first winding 10A is drawn from the inner periphery to the outer periphery, and the other side 12A of the winding is drawn from the inner periphery to the outer periphery while intersecting the one side 11A of the winding. The thickness of the winding axis C1A direction at the intersection of one side 11A of the winding and the other side 12A of the winding is configured to be equal to the thickness of the other part. Regarding the winding region of the wire 11A, the thickness in the direction of the winding axis C1A can be made uniform and the thickness can be reduced.
なお、第１巻線１０Ａの巻線の一方側１１Ａと巻線の他方側１２Ａおよび第２巻線２０Ａの巻線の他方側２２Ａを第２巻線２０Ａの外周まで引き出す際には、各巻線１０Ａ，２０Ａを横に寝かせた状態で第２巻線２１Ａの端面上を這わせるようにすれば、各巻線１０Ａ，２０Ａの引き出しライン部分の厚みを抑えられるので好ましい。 When one side 11A of the winding of the first winding 10A, the other side 12A of the winding, and the other side 22A of the second winding 20A are pulled out to the outer periphery of the second winding 20A, each winding It is preferable that the end surfaces of the second windings 21A are laid over with the 10A and 20A lying sideways, since the thickness of the lead-out line portions of the respective windings 10A and 20A can be suppressed.
〈第２実施形態〉
図２に示す第２実施形態に係るコイル１Ｂは、上述の第１実施形態に係るコイル１Ａと同様、無接点電力伝送用として好適な薄型タイプの空芯コイルであり、巻回軸線Ｃ１Ｂの回りに巻回された第１巻線１０Ｂ（本実施形態では複線で構成される）と、該第１巻線１０Ｂの外周部に密着するように該第１巻線１０Ｂと同軸に巻回された第２巻線２０Ｂ（本実施形態では複線で構成される）とからなる。
Second Embodiment
A coil 1B according to the second embodiment shown in FIG. 2 is a thin-type air-core coil suitable for contactless power transmission, similar to the coil 1A according to the first embodiment described above, and has a winding axis C1B . A first winding 10B wound around (configured with double wires in the present embodiment) and the first winding 10B are wound coaxially so as to be in close contact with the outer periphery of the first winding 10B. The second winding 20B (in this embodiment, it is composed of double wires).
上記第１巻線１０Ｂはα巻きにより巻回されている。すなわち、その巻線の一方側１１Ｂが第１巻線１０Ｂの内周から外周まで図中時計回りに密に巻回されるとともに、その巻線の他方側１２Ｂが内周から外周まで図中反時計回りに（巻線の一方側１１Ｂと同じ巻回角速度で）密に巻回されることにより、巻線の一方側１１Ｂおよび巻線の他方側１２Ｂが共に外周まで引き出されており、かつ巻線の一方側１１Ｂと巻線の他方側１２Ｂとの交差部分における巻回軸線Ｃ１Ｂ方向の厚みが他の部分の厚みと同等に構成されている。また、巻線の一方側１１Ｂの端部１１Ｂａおよび巻線の他方側１２Ｂの端部１２Ｂａは、それぞれ第１巻線１０Ｂの外周から第２巻線２０Ｂの端面上を径方向に這うようにして第２巻線２０Ｂの外周まで（端部１１Ｂａは図中上方へ、端部１２Ｂａは図中下方へと）引き出されている。なお、ここでのα巻きとは、従来一般的なα巻き（巻線の一方側と巻線の他方側との交差部分における巻線断面の縦横比が、交差しない部分における巻線断面の縦横比と同じになるもの）でも良いし、図１０を用いて説明したタイプのα巻きでも良い。 The first winding 10B is wound by α winding. That is, one side 11B of the winding is densely wound clockwise from the inner circumference to the outer circumference of the first winding 10B, and the other side 12B of the winding is counterclockwise from the inner circumference to the outer circumference. By densely winding clockwise (at the same winding angular velocity as one side 11B of the winding), one side 11B of the winding and the other side 12B of the winding are both pulled out to the outer periphery, and the winding the thickness of the winding axis C 1B direction is configured equal to that in other portions at the intersection of the other side 12B of the one side 11B and the winding of the line. Further, the end portion 11Ba on the one side 11B of the winding and the end portion 12Ba on the other side 12B of the winding run from the outer circumference of the first winding 10B to the end surface of the second winding 20B in the radial direction. The outer periphery of the second winding 20B is pulled out (the end 11Ba is upward in the figure and the end 12Ba is downward in the figure). Note that the α winding here is a conventional general α winding (the aspect ratio of the winding cross section at the intersection of one side of the winding and the other side of the winding is the aspect ratio of the winding cross section at the non-intersecting portion). It may be the same as the ratio) or the α winding of the type described with reference to FIG.
一方、上記第２巻線２０Ｂは通常巻きにより巻回されている。すなわち、その巻線の一方側２１Ｂが第２巻線２０Ｂの内周から外周まで（第１巻線１０Ｂの外周から第２巻線２０Ｂの外周まで）図中時計回りに密に巻回された後、該巻線の一方側２１Ｂの端部２１Ｂａが第２巻線２０Ｂの外周から図中下方に延出されている。また、その巻線の他方側２２Ｂは、第２巻線２０Ｂの内周において図中反時計回りに１/４回転ほど巻回された後、第２巻線２０Ｂの内周から該第２巻線２０Ｂの端面上を径方向に這うようにして第２巻線２０Ｂの外周まで引き出された後、その端部２２Ｂａが図中上方へと延出されている。 On the other hand, the second winding 20B is wound by normal winding. That is, one side 21B of the winding is densely wound clockwise from the inner circumference to the outer circumference of the second winding 20B (from the outer circumference of the first winding 10B to the outer circumference of the second winding 20B). Thereafter, an end 21Ba on one side 21B of the winding extends downward from the outer periphery of the second winding 20B. Further, the other side 22B of the winding is wound about 1/4 turn counterclockwise in the drawing on the inner circumference of the second winding 20B, and then the second winding 20B is wound from the inner circumference of the second winding 20B. After being drawn to the outer periphery of the second winding 20B so as to crawl on the end face of the wire 20B in the radial direction, the end 22Ba is extended upward in the drawing.
このように構成された第２実施形態に係るコイル１Ｂによれば、上述した第１実施形態に係るコイル１Ａと同様の効果が得られる。 According to the coil 1B according to the second embodiment configured as described above, the same effects as those of the coil 1A according to the first embodiment described above can be obtained.
〈第３実施形態〉
図３に示す第３実施形態に係るコイル１Ｃは、上述の第１実施形態に係るコイル１Ａおよび第２実施形態に係るコイル１Ｂと同様、無接点電力伝送用として好適な薄型タイプの空芯コイルであり、巻回軸線Ｃ１Ｃの回りに巻回された第１巻線１０Ｃ（本実施形態では複線で構成される）と、該第１巻線１０Ｃの外周部に密着するように該第１巻線１０Ｃと同軸に巻回された第２巻線２０Ｃ（本実施形態では複線で構成される）とからなる。
<Third Embodiment>
A coil 1C according to the third embodiment shown in FIG. 3 is a thin type air-core coil suitable for contactless power transmission, like the coil 1A according to the first embodiment and the coil 1B according to the second embodiment. , and the first winding 10C wound around the winding axis C 1C (comprised of double track in this embodiment), the first so as to be in close contact with the outer peripheral portion of the first winding 10C It consists of a second winding 20C (consisting of double wires in this embodiment) wound coaxially with the winding 10C.
上記第１巻線１０Ｃはナルト巻きにより巻回されている。すなわち、その巻線の一方側１１Ｃが第１巻線１０Ｃの内周から外周まで図中時計回りに密に巻回されるとともに、その巻線の他方側１２Ｃが内周から巻線の一方側１１Ｃと交差しながら図中反時計回りに緩やかな渦状の曲線を描くように巻回（略１周回）されながら第１巻線１０Ｃの外周まで引き出されており、かつその巻線の一方側１１Ｃと巻線の他方側１２Ｃとの交差部分における巻回軸線Ｃ１Ｃ方向の厚みが他の部分の厚みと同等に構成されている。 The first winding 10C is wound by Naruto winding. That is, one side 11C of the winding is densely wound clockwise in the drawing from the inner periphery to the outer periphery of the first winding 10C, and the other side 12C of the winding is connected from the inner periphery to one side of the winding. 11C is drawn to the outer periphery of the first winding 10C while being wound so as to draw a gentle spiral curve counterclockwise while intersecting 11C (substantially one turn), and on one side 11C of the winding The thickness in the direction of the winding axis C 1C at the intersection of the winding and the other side 12C of the winding is configured to be equal to the thickness of the other portion.
一方、上記第２巻線２０Ｃもナルト巻きにより巻回されている。すなわち、その巻線の一方側２１Ｃが第２巻線２０Ｃの内周から外周まで（第１巻線１０Ｃの外周から第２巻線２０Ｃの外周まで）図中時計回りに密に巻回されるとともに、その巻線の他方側２２Ｃが内周から巻線の一方側２１Ｃと交差しながら図中反時計回りに緩やかな渦状の曲線を描くように巻回（略１周回）されながら第２巻線２０Ｃの外周まで引き出されており、かつその巻線の一方側２１Ｃと巻線の他方側２２Ｃとの交差部分における巻回軸線Ｃ１Ｃ方向の厚みが他の部分の厚みと同等に構成されている。 On the other hand, the second winding 20C is also wound by Naruto winding. That is, one side 21C of the winding is densely wound clockwise from the inner circumference to the outer circumference of the second winding 20C (from the outer circumference of the first winding 10C to the outer circumference of the second winding 20C). At the same time, the other side 22C of the winding crosses the one side 21C of the winding from the inner periphery while winding so as to draw a gentle spiral curve counterclockwise in the drawing (substantially one turn), the second winding The wire 20C is drawn to the outer periphery, and the thickness in the winding axis C1C direction at the intersection of one side 21C of the winding and the other side 22C of the winding is configured to be equal to the thickness of the other portion. Yes.
また、この第３実施形態では、第１巻線１０Ｃにおける巻線の一方側１１Ｃおよび巻線の他方側１２Ｃを第２巻線２０Ｃの外周まで引き出す際にもナルト巻きが適用されている。すなわち、第１巻線１０Ｃにおける巻線の一方側１１Ｃおよび巻線の他方側１２Ｃは、それぞれ渦状の曲線を描くようにして（一方側１１Ｃは図中時計回り、他方側１２Ｃは図中反時計回り）、互いにあるいは第２巻線２０Ｃにおける巻線の一方側１１Ｃまたは巻線の他方側１２Ｃと交差しながら該第２巻線２０Ｃの外周まで引き出されており、かつ第２巻線２０Ｃは、第１巻線１０Ｃにおける巻線の一方側１１Ｃ、巻線の他方側１２Ｃおよび第２巻線２０Ｃの各々の交差部分における巻回軸線Ｃ１Ｃ方向の厚みが他の部分の厚みと同等に構成されている。 In the third embodiment, the Naruto winding is also applied when the one side 11C of the winding and the other side 12C of the winding in the first winding 10C are pulled out to the outer periphery of the second winding 20C. That is, one side 11C of the winding and the other side 12C of the winding in the first winding 10C draw a spiral curve (one side 11C is clockwise in the figure and the other side 12C is counterclockwise in the figure). The second winding 20C is drawn to the outer periphery of the second winding 20C while intersecting with each other or one side 11C of the winding in the second winding 20C or the other side 12C of the winding, and the second winding 20C In the first winding 10C, the thickness in the winding axis C1C direction at each of the intersecting portions of one side 11C of the winding, the other side 12C of the winding, and the second winding 20C is configured to be equal to the thickness of the other portion. ing.
このように構成された第３実施形態に係るコイル１Ｃによれば、上述した第１実施形態に係るコイル１Ａと同様の効果が得られるとともに、第２巻線２０Ｃの巻回領域においても、巻回軸線Ｃ１Ｃ方向の厚みを均一化することができるとともに薄型化が可能となる。 According to the coil 1C according to the third embodiment configured as described above, the same effect as that of the coil 1A according to the first embodiment described above can be obtained, and also in the winding region of the second winding 20C. The thickness in the direction of the rotation axis C 1C can be made uniform and the thickness can be reduced.
以上、本発明の実施形態について説明したが、本発明は上述の実施形態に態様が限定されるものではなく、種々に態様を変更することが可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.
例えば、上記実施形態においては、第１巻線および第２巻線が共に、巻回段階では素線同士が分離可能な複線で構成されている場合を例にとって説明しているが、第１実施形態における第２巻線２０Ａ、第２実施形態における第１巻線１０Ｂおよび第２巻線２０Ｂ、第３実施形態における第２巻線２０Ｃについては、単線あるいは撚り線を用いることも可能である。 For example, in the above-described embodiment, the case where both the first winding and the second winding are composed of double wires that can be separated from each other in the winding stage is described as an example. For the second winding 20A in the embodiment, the first winding 10B and the second winding 20B in the second embodiment, and the second winding 20C in the third embodiment, a single wire or a stranded wire may be used.
また、複線を用いる場合の素線の数や巻回時における素線の配列状態については、上述した各態様のものに限定されるものではなく、種々に変更することができる。 Further, the number of strands in the case of using double wires and the arrangement state of the strands at the time of winding are not limited to those in the above-described aspects, and can be variously changed.
さらに、上記実施形態においては、各コイルの外縁形状および空芯部の形状が共に円形とされているが、これらの形状を、Ｒ付きの矩形状あるいは楕円状とすることも可能である（これらの形状の例を、図１２，１３に示す）。図１２に示すコイル１Ｄは、外縁形状および空芯部の形状が共にＲ付きの矩形状とされたもので、第１巻線１０Ｄがα巻き、第２巻線２０Ｄが通常巻きとされている。図１３に示すコイル１Ｅは、外縁形状および空芯部の形状が共に楕円状とされたもので、第１巻線１０Ｅおよび第２巻線２０Ｄが共にα巻きとされている。なお、第１巻線１０Ｄ，１０Ｅや第２巻線２０Ｄ，２０Ｅにおいて、ナルト巻きを採用することも可能である。 Further, in the above embodiment, the outer edge shape and the air core portion of each coil are both circular, but these shapes may be rectangular with an R shape or elliptical (these Examples of the shape are shown in FIGS. The coil 1D shown in FIG. 12 has an outer edge shape and an air-core portion both in a rectangular shape with R, and the first winding 10D is α-winding and the second winding 20D is normal winding. . The coil 1E shown in FIG. 13 has an outer edge shape and an air core portion that are both elliptical, and the first winding 10E and the second winding 20D are both α-wound. In addition, Naruto winding is also employable in the first windings 10D and 10E and the second windings 20D and 20E.
また、本発明のコイルは、無接点電力伝送用の送電側または受電側のコイルに限定されるものではなく、第１巻線を１次側巻線、第２巻線を２次側巻線（逆でも良い）として備えたトランス用のコイルとしても用いることが可能である。 Further, the coil of the present invention is not limited to the power transmission side or power reception side coil for contactless power transmission, and the first winding is the primary winding and the second winding is the secondary winding. It can also be used as a coil for a transformer provided as (which may be reversed).
また、上記実施形態においては、第１巻線の外周部に第２巻線のみが巻回されている態様を示しているが、第２巻線の外周部に第３巻線を巻回し、その外周部に第４巻線を巻回し、さらにその外周部に…というように、コイルとして利用する領域をより多段階に分割できるように構成することも可能である。 In the above embodiment, only the second winding is wound around the outer periphery of the first winding, but the third winding is wound around the outer periphery of the second winding. It is also possible to divide the area used as the coil into more stages, such as winding the fourth winding around the outer periphery and further to the outer periphery.
また、本発明のコイルは、空芯コイルのみならず、ボビンやコアに巻き付ける態様のコイルにも、同様に適用することが可能である。 The coil of the present invention can be similarly applied not only to an air-core coil but also to a coil wound around a bobbin or a core.
１Ａ，１Ｂ，１Ｃ，１Ｄ，１Ｅ コイル
１０Ａ，１０Ｂ，１０Ｃ，１０Ｄ，１０Ｅ 第１巻線
１１Ａ，１１Ｂ，１１Ｃ，１１Ｄ，１１Ｅ （第１巻線における）巻線の一方側
１１Ａａ，１１Ｂａ，１１Ｃａ，１１Ｄａ，１１Ｅａ （第１巻線における巻線の一方側の）端部
１２Ａ，１２Ｂ，１２Ｃ，１２Ｄ，１２Ｅ （第１巻線における）巻線の他方側
１２Ａａ，１２Ｂａ，１２Ｃａ，１２Ｄａ，１２Ｅａ （第１巻線における巻線の他方側の）端部
２０Ａ，２０Ｂ，２０Ｃ，２０Ｄ，２０Ｅ 第２巻線
２１Ａ，２１Ｂ，２１Ｃ，２１Ｄ，２１Ｅ （第２巻線における）巻線の一方側
２１Ａａ，２１Ｂａ，２１Ｃａ，２１Ｄａ，２１Ｅａ （第２巻線における巻線の一方側の）端部
２２Ａ，２２Ｂ，２２Ｃ，２２Ｄ，２２Ｅ （第２巻線における）巻線の他方側
２２Ａａ，２２Ｂａ，２２Ｃａ，２２Ｄａ，２２Ｅａ （第２巻線における巻線の他方側の）端部
３０，３０´，３０Ａ，３０Ｂ，３０Ｃ，３０Ｄ，３０Ｅ 巻線
３１，３１´，３１Ａ，３１Ｂ，３１Ｃ 巻線の一方側
３２，３２´，３２Ａ，３２Ｂ，３２Ｃ 巻線の他方側
３３Ｄ，３３Ｅ 端面
４０ （巻線機の）巻軸
５０Ｄ，５０Ｅ （巻線の一方側と巻線の他方側との）交差部分
Ｃ１Ａ，Ｃ１Ｂ，Ｃ１Ｃ，Ｃ１Ｄ，Ｃ１Ｅ，Ｃ３０，Ｃ３０´，Ｃ３０Ａ，Ｃ３０Ｂ，Ｃ３０Ｃ 巻回軸線
1A, 1B, 1C, 1D, 1E Coil 10A, 10B, 10C, 10D, 10E First winding 11A, 11B, 11C, 11D, 11E One side of winding (in first winding) 11Aa, 11Ba, 11Ca, 11Da, 11Ea (on one side of the winding in the first winding) 12A, 12B, 12C, 12D, 12E (on the first winding) the other side of the winding 12Aa, 12Ba, 12Ca, 12Da, 12Ea (first Ends 20A, 20B, 20C, 20D, 20E of windings in one winding (second side) 21A, 21B, 21C, 21D, 21E One side of windings (in second winding) 21Aa, 21Ba , 21Ca, 21Da, 21Ea (on one side of the winding in the second winding) end 22A, 22B, 22C, 22D, 22E (in the second winding) winding The other side of the wire 22Aa, 22Ba, 22Ca, 22Da, 22Ea (the other side of the winding in the second winding) End 30, 30 ', 30A, 30B, 30C, 30D, 30E Winding 31, 31', 31A , 31B, 31C One side of winding 32, 32 ', 32A, 32B, 32C The other side of winding 33D, 33E End face 40 (winding machine) winding axis 50D, 50E (one side of winding and winding other side of the) intersection C 1A, C 1B, C 1C , C 1D, C 1E, C 30, C 30', C 30A, C 30B, C 30C winding axis
Claims (3)
前記第１巻線および前記第２巻線のうち少なくとも該第１巻線は、巻線の一方側が内周から外周まで巻回されるとともに、巻線の他方側が内周から該巻線の一方側と交差しながら外周まで引き出されており、かつ該巻線の一方側と該巻線の他方側との交差部分における前記巻回軸線方向の厚みが他の部分の厚みと同等に構成されていることを特徴とするコイル。 A single wire or a single wire wound around a winding axis, and a single wire or a single wire wound coaxially with the first winding so as to be in close contact with the outer periphery of the first winding A coil having a second winding made of double wires,
At least the first winding of the first winding and the second winding is wound on one side of the winding from the inner periphery to the outer periphery, and on the other side of the winding from the inner periphery to one of the windings. The winding is pulled out to the outer periphery while intersecting the side, and the thickness in the winding axis direction at the intersection of one side of the winding and the other side of the winding is configured to be equal to the thickness of the other part. Coil characterized by being.
One side of the winding and the other side of the winding in the first winding are drawn to the outer periphery of the second winding while intersecting the second winding so as to draw a spiral curve. And the second winding has a different thickness in the winding axis direction at one side of the winding in the first winding, the other side of the winding, and the intersection of each of the second windings. The coil according to claim 2, wherein the coil is configured to be equal in thickness to the portion.
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| JP2010172477A JP5532422B2 (en) | 2010-07-30 | 2010-07-30 | coil |
| CN201110025988.3A CN102347127B (en) | 2010-07-30 | 2011-01-20 | Coil |
| US13/032,966 US8207807B2 (en) | 2010-07-30 | 2011-02-23 | Coil |
| EP11156275.7A EP2413335B1 (en) | 2010-07-30 | 2011-02-28 | Coil |
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| JP2010172477A JP5532422B2 (en) | 2010-07-30 | 2010-07-30 | coil |
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| EP (1) | EP2413335B1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2413335B1 (en) | 2021-06-30 |
| US20120025940A1 (en) | 2012-02-02 |
| EP2413335A3 (en) | 2017-07-26 |
| CN102347127A (en) | 2012-02-08 |
| CN102347127B (en) | 2014-11-26 |
| JP5532422B2 (en) | 2014-06-25 |
| EP2413335A2 (en) | 2012-02-01 |
| US8207807B2 (en) | 2012-06-26 |
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